Device for upsetting and restoring screw-threads



(No Model.)

' M; KE'PLER.

DEVICE FOR UPSETTING AND RESTORING SCREW THREADS. No. 289,271. PatentedNovJZ'Y, 1883.

' 7 :ATTORNEYS V WITNESSES N. PEIER$. mow-ma um. wnhin m. n. c

. UNITED STATES PATENT OFFICE.

MARTIN KEPLER, OF DEEDSVILLE, INDIANA.

DEVICE FOR UPSETTINGAND RESTORING SCREW-THREADS.

SPECIFICATION forming part of Letters Patent No. 289,271, dated November27, 1883.

Applicatidn filed June 23,1883. (to model.) i

'To all whom it may concern.-

Be it known that LMARTIN KEPLER, a citizen of the United States,residing at Deedsville, in the county of Miami and State of Indiana,have invented certain new and useful Improvements in Devices forUpsetting and Restoring Screw-Threads; and I do declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being. had to the accompanying drawings, andtoletters or figures of reference marked thereon, which form a part ofthis specification.

Figure 1 of the drawings is a side view of my device. Fig. 2 is an edgeview of the same, and Fig. 3 is a detail perspective view.

This invention has relation to devices for upsetting and restoring thescrew-threads on bolts and rods, whereby the nuts employed on said rodsor bolts maybe locked and unlocked at pleasure; and it consists in theconstruction and novel arrangement ofv parts, as will be hereinafterfully described, and particularly pointed out in the claim appended.

Referring by letter to the accompanying drawings, a and b designate twojaw-levers, which are pivoted together at c. The jaw of the lever a isformed with two bent claws, (Z and e, the claw dbeing longer than theclaw e. The ends of these claws are curved inwardly, as shown. and havea space, 9', between them. The other lever-jaw, l), is formed with clawsk and Z, the claw k being the longer of these tw which are both shorterthan the claws d and e, and have their ends curved inwardly toward theconcavities m m of the claws d and 6, respectively, as shown. The pointof the longer claw, 7c, of the lever-jaw b is provided with a smallbeveleddog, n,which is intended to bite into the threads and upset them,for a purpose hereinafter explained. The point of the shorter claw, Z,of the leverjaw b is provided with a pointed dog, o,wl 1ich is designedto travel in the groove of the threads to restore threads that have beenpreviously upset to their normal position.

To use the device for looking a nut in place on a bolt or rod, the nutis first turned up to place by means of a nut-wrench, and the longerclaw,d, of the lever b is hooked around the proj ecting threaded portionof the bolt or red close upon the nut, and by closing the jaw it uponthe threads the dog n will bite upon them, and when the device is turnedby its levers a short distance the dog a will upset or flatten severalof the screw-threads immediately at the face of the nut, which will lockit so that it .cannot be turned off. To unlock the nut, turn the deviceover so that the claws e and Z will engage the bolt. Then hook theshorter claw, e, on the lever-jaw,a, around the threaded portion of thebolt, letting said claw e rest against the face of the nut. Close theshorter claw, Z, upon the threads tightly, and turn the device aroundupon the threads until the pointed dog 0 of the clawl shall haverestored the upset or flattened threads, when the device may be removedandthe wrench employed to unscrew the nut.

As will readily be seen, no two of the claws are of the same length. I

This device is cheap, simple, and effective, and its utility is obvious.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The herein-described device for upsetting and restoring threads on boltsand rods, consisting of a pair of pivoted jaw-levers each having twoinwardly-curved claws of different lengths, the claws of one of thelever-jaws being provided with the dogs a and 0, substantially asspecified.

In testimony whereof Iaffix my signature in presence of two witnesses.

MARTIN KEPLER.

Witnesses:

F. W. HUTcHIsON, HARRISON GRIMEs.

